import java.util.Random;


public class Test {

	public static void main(String args[]) {
		
		Random rd = new Random() ;
		for(int i=0 ; i<10 ; i++) {
			char x = (char) (97+rd.nextInt(26)) ;
			System.out.println(x) ;
		}
		System.out.println("ok") ;
		
	}
}
